Abstract: A pumpable resin system for installation of mine roof bolts includes a resin feed pump in fluid communication with a resin source, a catalyst feed pump in fluid communication with a catalyst source, a resin injection cylinder pump in fluid communication with the resin feed pump, with the resin feed pump configured to transfer resin to the resin injection cylinder pump when the resin feed pump is actuated, a catalyst injection cylinder pump in fluid communication with the catalyst feed pump, the catalyst feed pump configured to transfer catalyst to the catalyst injection cylinder pump when the catalyst feed pump is actuated, a hydraulic piston, with the resin injection cylinder pump and the catalyst injection cylinder pump slaved together and controlled by the hydraulic piston, a resin line in fluid communication with the resin injection cylinder pump, and a catalyst line in fluid communication with the catalyst injection cylinder pump.

Abstract: An adjustable lattice girder includes a first lattice girder portion having a first end and a second end positioned opposite the first end, with the first lattice girder portion having a first connection member, and a second lattice girder portion having a first end and a second end positioned opposite the first end, with the second lattice girder portion having a second connection member configured to engage the first connection member. The first connection member is slidable relative to the second connection member between a first position corresponding to a first distance between the second end of the first lattice girder portion and the first end of the second lattice girder portion, and a second position corresponding to a second distance between the second end of the first lattice girder portion and the first end of the second lattice girder portion. The first distance different than the second distance.

Abstract: A mine bolt bending system includes a frame comprising a plurality of bolt receiving portions each configured to receive and hold a mine roof bolt, a bolt contact member secured to the frame, with the bolt contact member rotatable relative to the frame between a first position and second position, and an actuator secured to the frame, with the actuator configured to move the bolt contact member between the first and second positions. The bolt contact member is configured to bend a mine bolt when rotating from the first position to the second position.

Abstract: A pumpable resin system for installation of mine roof bolts includes a resin feed pump in fluid communication with a resin source, a catalyst feed pump in fluid communication with a catalyst source, a resin injection cylinder pump in fluid communication with the resin feed pump, with the resin feed pump configured to transfer resin to the resin injection cylinder pump when the resin feed pump is actuated, a catalyst injection cylinder pump in fluid communication with the catalyst feed pump, the catalyst feed pump configured to transfer catalyst to the catalyst injection cylinder pump when the catalyst feed pump is actuated, a hydraulic piston, with the resin injection cylinder pump and the catalyst injection cylinder pump slaved together and controlled by the hydraulic piston, a resin line in fluid communication with the resin injection cylinder pump, and a catalyst line in fluid communication with the catalyst injection cylinder pump.

Abstract: An adjustable lattice girder includes a first lattice girder portion having a first end and a second end positioned opposite the first end, with the first lattice girder portion having a first connection member, and a second lattice girder portion having a first end and a second end positioned opposite the first end, with the second lattice girder portion having a second connection member configured to engage the first connection member. The first connection member is slidable relative to the second connection member between a first position corresponding to a first distance between the second end of the first lattice girder portion and the first end of the second lattice girder portion, and a second position corresponding to a second distance between the second end of the first lattice girder portion and the first end of the second lattice girder portion. The first distance different than the second distance.

Abstract: A pumpable resin system for installation of mine roof bolts includes a resin feed cylinder pump, a catalyst feed cylinder pump, a resin cylinder pump in fluid communication with the resin feed cylinder, with the resin feed cylinder configured to transfer resin to the resin cylinder pump when the resin feed cylinder pump is actuated, a catalyst cylinder pump in fluid communication with the catalyst feed cylinder, with the catalyst feed cylinder configured to transfer catalyst to the catalyst cylinder pump when the catalyst feed cylinder pump is actuated, a resin line in fluid communication with the resin cylinder pump, and a catalyst line in fluid communication with the catalyst cylinder pump.

Abstract: A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, with the elongated body having a first threaded section, a second threaded section, and a non-threaded section positioned between the first threaded section and the second threaded section. The non-threaded section is configured to yield under loading when the mine bolt is installed with grout in a bore hole.

Abstract: A mine bolt bending system includes a frame comprising a plurality of bolt receiving portions each configured to receive and hold a mine roof bolt, a bolt contact member secured to the frame, with the bolt contact member rotatable relative to the frame between a first position and second position, and an actuator secured to the frame, with the actuator configured to move the bolt contact member between the first and second positions. The bolt contact member is configured to bend a mine bolt when rotating from the first position to the second position.

Abstract: A rock bolt system includes a fitting including a main body defining a central opening configured to receive a rock bolt and a grout body defining a space between the main body and the grout body, with the main body defining a grout opening in fluid communication with the central opening. The main body is rotatable relative to the grout body, with the grout body defining a resin port and a catalyst port. The resin port and the catalyst port are in fluid communication with the space and the grout opening of the main body. The system further includes a rock bolt defining a central opening, with the central opening of the rock bolt configured to be in fluid communication with the central opening of the fitting when the rock bolt is secured to the fitting.

Abstract: A pumpable resin system for installation of mine roof bolts includes a resin feed cylinder pump, a catalyst feed cylinder pump, a resin cylinder pump in fluid communication with the resin feed cylinder, with the resin feed cylinder configured to transfer resin to the resin cylinder pump when the resin feed cylinder pump is actuated, a catalyst cylinder pump in fluid communication with the catalyst feed cylinder, with the catalyst feed cylinder configured to transfer catalyst to the catalyst cylinder pump when the catalyst feed cylinder pump is actuated, a resin line in fluid communication with the resin cylinder pump, and a catalyst line in fluid communication with the catalyst cylinder pump.

Abstract: A pumpable resin system for installation of mine roof bolts includes a resin reservoir configured to receive resin, a catalyst reservoir configured to receive catalyst, a resin pump arrangement in fluid communication with the resin reservoir, a catalyst pump arrangement in fluid communication with the catalyst reservoir, a delivery line in fluid communication with at least one of the resin pump arrangement and the catalyst pump arrangement, and a bolter arm configured to drill boreholes and install mine roof bolts. The delivery line is configured to deliver resin and catalyst from the resin reservoir and the catalyst reservoir to a borehole via the bolter arm.

Abstract: A mine roof bolting system including a bearing member having a first member, a second member spaced apart from the first member, and apertures defined through each of the first and second members, and a mine roof bolt extending through the apertures. When a load is applied to the mine roof bolting system, the bearing member yields or deforms. Also, a method for providing a roof support in an underground mine including providing the bearing member and inserting a mine roof bolt through the apertures of the bearing member and into a borehole in a mine roof, wherein the bearing member yields upon application of a load in excess of a predetermined load.

Abstract: A mine bolt includes an elongated body having a first end and a second end positioned opposite the first end, and an anchor comprising a tube defining a central opening and a slot extending at least a portion of the length of the tube. The anchor is secured to the elongated body. The anchor is configured to compress upon installation of the mine bolt to anchor the elongated body within a bore hole.

Abstract: A rock bolt system includes a fitting including a main body defining a central opening configured to receive a rock bolt and a grout body defining a space between the main body and the grout body, with the main body defining a grout opening in fluid communication with the central opening. The main body is rotatable relative to the grout body, with the grout body defining a resin port and a catalyst port. The resin port and the catalyst port are in fluid communication with the space and the grout opening of the main body. The system further includes a rock bolt defining a central opening, with the central opening of the rock bolt configured to be in fluid communication with the central opening of the fitting when the rock bolt is secured to the fitting.

Abstract: A rock bolt system includes a fitting having a main body defining a central opening configured to receive a rock bolt, with the main body defining a grout opening in fluid communication with the central opening, and a grout body defining a space between the main body and the grout body. The main body is rotatable relative to the grout body, with the grout body defining a resin port and a catalyst port. The resin port and the catalyst port are in fluid communication with the space and the grout opening of the main body. A rock bolt defines a central opening, with the central opening of the rock bolt configured to be in fluid communication with the central opening of the fitting when the rock bolt is secured to the fitting.

Abstract: A mine rib support includes first and second elongate members each having a first end and a second end, a center plate having a body defining a first opening that receives the first elongate member, a second opening that receives the second elongate member, and an installation opening configured to receive a mine bolt, a first end plate defining first and second openings for receiving the first end of the first and second elongate members, respectively, and a second end plate defining first and second openings for receiving the second end of the first and second elongate members, respectively.

Abstract: A mine prop includes a first pipe having a first end and a second end, a second pipe having a first end and a second end, and a yield member secured to the second pipe. The second pipe is slidably received in the first pipe. The yield member is configured to yield before the first and second pipes when the mine prop is placed under a predetermined load.

Abstract: Rock bolts comprising an expandable tube having a longitudinally extending depression disposed between two curved outer portions of the tube, wherein the depression defines a channel having an opening defined between the two curved outer portions of the tube and the width of the opening is at least 10% of the width of the tube and/or a coating layer covers at least a portion of the expandable tube. Also, a method of manufacturing a rock bolt comprising forming an expandable tube comprising a longitudinally extending depression disposed between two curved outer portions of the tube, crimping a proximal end of the tube to form a crimped portion, and placing a sleeve around the crimped portion. Prior to crimping, a temporary spacer is placed in the channel in a portion of the tube adjacent to the portion of the tube that will be crimped.

Abstract: A rock bolt system includes a fitting having a main body defining a central opening configured to receive a rock bolt, with the main body defining a grout opening in fluid communication with the central opening, and a grout body defining a space between the main body and the grout body. The main body is rotatable relative to the grout body, with the grout body defining a resin port and a catalyst port. The resin port and the catalyst port are in fluid communication with the space and the grout opening of the main body. A rock bolt defines a central opening, with the central opening of the rock bolt configured to be in fluid communication with the central opening of the fitting when the rock bolt is secured to the fitting.

Abstract: A pumpable resin system for installation of mine roof bolts includes a resin reservoir configured to receive resin, a catalyst reservoir configured to receive catalyst, a resin pump arrangement in fluid communication with the resin reservoir, a catalyst pump arrangement in fluid communication with the catalyst reservoir, a delivery line in fluid communication with at least one of the resin pump arrangement and the catalyst pump arrangement, and a bolter arm configured to drill boreholes and install mine roof bolts. The delivery line is configured to deliver resin and catalyst from the resin reservoir and the catalyst reservoir to a borehole via the bolter arm.